I, too, have been on Diovan HCT 80mg/12.5mg for about five years. I woke up one day with hip pain on the right side radiating down toward my knee. The next day I had tenderness at my right ankle. A day or two later both my wrists were tender. Then one morning my left knee was sore and felt unstable. That lasted for a month and a half. I get tenderness in my tendons from my shoulders down and also from my ankles up. This is not from injury. It sounds a lot like what you experienced. My Doctor retired so I was without a physician. I did get one finally and she recently gave my just Diovan 160mg. For two days I stopped taking anything and felt better. Today i started the Diovan 160 and have left knee pain and tendon tenderness again. My doctor thought it was the HCT part of the medication causing my symptoms, but I'm not certain. I will try it her way for a while and see what happens. What did your doctor recommend.